The practical methods of signal pre - processing ( anti - disturbance filtering , data smoothing ) and character extraction ( differential limitation , absolute peak value , peak - to - peak value , area of wave and self - adaptive threshold adjustment ) are introduced 并介紹了一些實(shí)用的信號(hào)處理和特征提取算法,包括可以實(shí)時(shí)運(yùn)算的用于抑制干擾的濾波器和數(shù)據(jù)平滑算法及用于定量分析的差分超限數(shù)、絕對(duì)峰值、峰-峰值、波形下面積和自適應(yīng)門限調(diào)整等算法及其應(yīng)用。